One final anecdote from the Air China Medical.
You are required to have a chest X-Ray apparently.
My mates told me they were herded into the X-Ray room together, then the first man was told to strip to the waist and position himself against the target - the radiographer retreated behind his lead screen, but left the other guys all standing around the 'patient'!
If one of them hadn't shouted HALT the radiographer would have happily zapped them all 6 times with X-Rays!! Chinese Aviation Medicals are bad for your health!!
BTW, one of the guys reported that the X-Ray machine was pointed outward at a flimsy wooden door, behind which people were queuing for their turn. So even if you aren't in that room you may be getting dosed with X-Rays every time they fire. Stand well back! Be warned.